CN2536854Y - Self lubricant assembled rotary plug valve with reversed tapered sealing surface - Google Patents
Self lubricant assembled rotary plug valve with reversed tapered sealing surface Download PDFInfo
- Publication number
- CN2536854Y CN2536854Y CN 02220265 CN02220265U CN2536854Y CN 2536854 Y CN2536854 Y CN 2536854Y CN 02220265 CN02220265 CN 02220265 CN 02220265 U CN02220265 U CN 02220265U CN 2536854 Y CN2536854 Y CN 2536854Y
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- Prior art keywords
- valve
- sealing
- faucet body
- self
- utility
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- Expired - Fee Related
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Abstract
The utility model relates to a back taper metal sealing self-lubrication combination type plug valve, comprising a valve body, a cock body, a valve rod, a valve cap, a sealing part and a setting part. The utility model is characterized in that: reverse structure is adopted for the cock body which is provided with a through hole leading to the empty cavity on the endface of the small end and the big end; a check valve is arranged in a through hole leading to the small end. The utility model has the advantages of self-locking sealing and self-loosening opening function, small open-close torque, good sealing performance, long service life and be suitable for high pressure operating condition and ducts with large aperture. Furthermore, sealing load adjusting screw is arranged at the end cover of big end for the cock body, which can externally adjust the sealing load between the sealing face of the valve body and the sealing face cock body.
Description
Technical field
The utility model relates to a kind of valve, specifically about a kind of metallic seal selflubricating stopcock.
Background technique
Stopcock has metallic seal and two kinds of sealing configuration forms of soft seal, complete mechanical sealing between the faucet body of metallic seal stopcock and the valve body, the operating mode that can be suitable for higher temperature is used, but the area of contact between its faucet body and the valve body is big, it is big to open and close frictional force and moment of torsion, can only be suitable for the low pressure operating mode and use.And the wearing and tearing between sealing surface are big in the opening-closing process, and its sealability will obviously descend after use a period of time, even occur leaking, and sealability is unreliable, and working life is short.
It by the patent No. of the applicant application 00216980.0 hard sealing self lubricating plug valve, be carved with the greasing groove on valve seal conical bore surface and faucet body O-ring poppet surface, inject seal gease by grease pouring valve, make valve realize machinery and grease double seal, keep the lubricated of sealing surface opening-closing process, reduce to open and close frictional force, improve sealing reliability, prolong product working life.But, the hard sealing self lubricating plug valve of this structure, in the valve opening and closing process, be in mutual Frotteurism between valve seal conical bore surface and the faucet body O-ring poppet surface, its open and close torque is still bigger, also have wearing and tearing between the sealing surface, when using on high pressure operating mode and large diameter pipeline especially, problem is more outstanding.So this constructed products still exists bigger keying frictional force and moment of torsion, fundamentally do not solve the wearing and tearing and the product short problem in working life of sealing surface, the operating mode that can only be suitable for more small-bore pipeline and lower pressure is used.
The model utility content
The purpose of this utility model is the shortcoming that exists at prior art, provide that a kind of open and close torque is little, valve seal conical bore surface and faucet body O-ring poppet surface do not have frictional property wearing and tearing, good seal performance long service life in the opening-closing process, are suitable for the back taper metallic seal selflubricating combined type stopcock that high pressure, large diameter pipeline use.
The technological scheme that realizes the utility model purpose comprises valve body, faucet body, valve rod, limiting stopper, valve gap, Sealing and assembling set, its key problem in technology is that faucet body adopts inverted structure, promptly big end down, small end is last, and can on the valve rod axis direction, move, in the passage of faucet body, be shaped on the through hole that leads to small end and big end end face cavity, and in leading to the through hole of small end, safety check be set.
In above technological scheme, the big end end caps of faucet body is provided with the seal pressure adjusting screw.
The utility model beneficial effect compared with prior art is that the pressure medium in the faucet body passage is guided in small end and the big end end face cavity, under the stopcock closed condition, faucet body up pushes away under the effect of big end pressure medium, make sealing surface in conjunction with tighter, in the moment that stopcock has just been opened, the big end medium of faucet body is by pressure release, small end remains pressure under the effect of safety check, under the effect of small end pressure medium and spring, faucet body is pushed away under slightly, break away from valve body sealing surface, have self-tightening sealing and unclamp the function that opens certainly, realize not having friction and open and close.Open and close torque is little, good seal performance, long service life, is suitable for using on high pressure operating mode and the large diameter pipeline.In addition, the utility model can also be regulated the seal pressure adjusting screw from the outside, adjusts the seal pressure of valve body sealing surface and faucet body sealing surface, accomplishes to guarantee that sealability makes its keying laborsaving again.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Back taper metallic seal selflubricating combined type stopcock as shown in Figure 1 comprises valve body 9 faucet bodies 8, valve rod 13, lower cover 1, loam cake 17, limiting stopper 20, Sealing and assembling set.Faucet body 8 is an inverted structure, promptly big end down, small end is last, is carved with the greasing groove on valve seal conical bore surface and faucet body O-ring poppet surface, by grease pouring valve 10 injection seal geases, grease pouring valve 10 is an one-way valve.In the passage of faucet body 8, be shaped on the through hole that leads to small end and big end end face cavity, and in leading to the through hole of small end, safety check is set, make in the small end end face cavity and remain certain pressure, this safety check is made up of steel ball 11 that places the through hole outlet port and spring 12.The small end of faucet body 8 is connected with valve rod 13, can move up and down at the axial direction of valve rod 13.Between valve body 9 and valve rod 13, be provided with thrust bearing 14, Packing seat 15 and filler 16, and compress by screw 19 by loam cake 17.Be provided with dust-proof seal ring 18 between loam cake 17 and the valve rod 13.Lower cover 1 is installed on the valve body 9 by screw 7, is provided with steel plate washer 5 and Graphite pad 6 between lower cover 1 and valve body 9.Be provided with plug screw 2 and seal pressure adjusting screw 3 and jacking block 4 in the middle of the lower cover 1, adjust the seal pressure of valve body sealing surface and faucet body sealing surface by seal pressure adjusting screw 3.
Claims (2)
1, a kind of back taper metallic seal selflubricating combined type stopcock, comprise valve body (9), faucet body (8), valve rod (13), limiting stopper (20), valve gap, Sealing and assembling set, it is characterized in that faucet body (8) adopts inverted structure, promptly big end down, small end is last, and can on valve rod (13) axial direction, move, in the passage of faucet body, be shaped on the through hole that leads to small end and big end end face cavity, and in leading to the through hole of small end, safety check be set.
2, back taper metallic seal selflubricating combined type stopcock according to claim 1 is characterized in that the end cap of the big end of faucet body (8) is provided with seal pressure adjusting screw (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02220265 CN2536854Y (en) | 2002-04-25 | 2002-04-25 | Self lubricant assembled rotary plug valve with reversed tapered sealing surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02220265 CN2536854Y (en) | 2002-04-25 | 2002-04-25 | Self lubricant assembled rotary plug valve with reversed tapered sealing surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2536854Y true CN2536854Y (en) | 2003-02-19 |
Family
ID=33698588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02220265 Expired - Fee Related CN2536854Y (en) | 2002-04-25 | 2002-04-25 | Self lubricant assembled rotary plug valve with reversed tapered sealing surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2536854Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162532A (en) * | 2011-04-02 | 2011-08-24 | 江苏九龙阀门制造有限公司 | Low-temperature high pressure balancing plug valve |
| CN102278495A (en) * | 2010-06-10 | 2011-12-14 | 沃泰阀门(昆山)有限公司 | spring balance type plug valve |
| CN104214362A (en) * | 2014-08-27 | 2014-12-17 | 苏州福润机械有限公司 | Plug valve |
| CN105650294A (en) * | 2016-04-08 | 2016-06-08 | 张新丰 | Assembly method of plug valve with adjustable seal specific pressure |
| CN105650300A (en) * | 2016-04-08 | 2016-06-08 | 张新丰 | Plug valve with adjustable seal specific pressure |
| CN108119663A (en) * | 2017-12-26 | 2018-06-05 | 福斯流体控制（苏州）有限公司 | Metal hard-sealing high temperature high pressure stop cock |
| CN108953659A (en) * | 2018-08-27 | 2018-12-07 | 江苏华太电力仪表有限公司 | A kind of high-temperature and high-presure resistent ball valve |
| CN109973676A (en) * | 2019-04-26 | 2019-07-05 | 昆山艾蓓蓓阀门有限公司 | A kind of tap structure reducing plug valve torque |
-
2002
- 2002-04-25 CN CN 02220265 patent/CN2536854Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278495A (en) * | 2010-06-10 | 2011-12-14 | 沃泰阀门(昆山)有限公司 | spring balance type plug valve |
| CN102162532A (en) * | 2011-04-02 | 2011-08-24 | 江苏九龙阀门制造有限公司 | Low-temperature high pressure balancing plug valve |
| CN102162532B (en) * | 2011-04-02 | 2015-03-25 | 江苏九龙阀门制造有限公司 | Low-temperature high pressure balancing plug valve |
| CN104214362A (en) * | 2014-08-27 | 2014-12-17 | 苏州福润机械有限公司 | Plug valve |
| CN105650294A (en) * | 2016-04-08 | 2016-06-08 | 张新丰 | Assembly method of plug valve with adjustable seal specific pressure |
| CN105650300A (en) * | 2016-04-08 | 2016-06-08 | 张新丰 | Plug valve with adjustable seal specific pressure |
| CN108119663A (en) * | 2017-12-26 | 2018-06-05 | 福斯流体控制（苏州）有限公司 | Metal hard-sealing high temperature high pressure stop cock |
| CN108953659A (en) * | 2018-08-27 | 2018-12-07 | 江苏华太电力仪表有限公司 | A kind of high-temperature and high-presure resistent ball valve |
| CN109973676A (en) * | 2019-04-26 | 2019-07-05 | 昆山艾蓓蓓阀门有限公司 | A kind of tap structure reducing plug valve torque |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030219 Termination date: 20100425 |